What is the role of hemoglobin in respiration?
A. Hemoglobin is responsible for the production of red blood cells in the bone marrow.
B. Hemoglobin regulates blood pH levels by binding to hydrogen ions.
C. Hemoglobin absorbs carbon dioxide in the lungs and releases oxygen in the tissues.
D. Hemoglobin transports oxygen from the lungs to the body’s tissues and carries carbon dioxide back to the lungs.
Select your answer:
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Diagnostics and Pathology Reports › ViewWhat is true about stage I breast cancers?
A. There is a single tumor that is less than 2 cm
B. There is a single tumor that is between 2-5 cm
C. Cancer has spread to at least 3 underarm lymph nodes
D. Cancer has spread to distant organs like the lungs
Pulmonology › View
A small flap of tissue that covers the trachea when swallowing is called the
A. bronchi
B. larynx
C. pharynx
D. epiglottis